Man wearing photochromatic sunglasses in shade. Sunglasses are used to protect the eyes from bright light and excessive ultraviolet (UV) light. Dark glasses can be a problem in variable light levels but photochromatic sunglasses adjust their density swiftly according to the amount of UV light that is detected. Plastic photochromic lenses use organic photochromic molecules that are sensitive to natural UV. The glasses become lighter in shade or indoors. For these glasses in bright sun see C054/9478. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Chillmaid, Martyn F. |
Bildgröße: | 3419 px × 5110 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |